package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.dao.DeadlockLoserDataAccessException;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.RequestParam;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
@Autowired
private DishMapper dishMapper;
@Autowired
private DishFlavorMapper dishFlavorMapper;
@Autowired
private SetMealDishMapper setMealDishMapper;
    /**
     * 新增菜品和对应的口味
     * @param dishDTO
     * @return
     */

    /*@Transactional//要么全部成功要么全部失败*/
    @Override
    public void save(DishDTO dishDTO) {

    //向菜品表插入1条数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);
        //获取insert语句生成的主键值
        Long dishId = dish.getId();
        //向口味表插入n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if(flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //向口味中插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /**
     * 分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
       Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
//1.判断当前菜品是否存在起售中
        for (Long id : ids) {
           Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE){
                //当前菜品处于售卖中不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
//2.判断当前菜品是否能够删除--是否被套餐关联
        List<Long> setmealIds = setMealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds != null && setmealIds.size() > 0){
//当前菜品套餐关联了，不能删除
            throw new  DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
/*//3.删除菜品表中的菜品数据
        for (Long id : ids) {
            if(id != null){
                //删除菜品
                dishMapper.deleteById(id);
                //删除口味
                dishFlavorMapper.deleteById(id);
            }
        }*/
        //根据菜品id集合批量删除菜品数据
        dishMapper.deleteByIdBatch(ids);
        //根据菜品id集合批量删除关联的口味数据
        dishFlavorMapper.deleteByIdBatch(ids);
    }

    /**
     * 根据id查询
     * @param id
     * @return
     */
    @Override
    public DishVO selectById(Long id) {

      //1.查询菜品表并封装

       Dish dish = dishMapper.selectById(id);
      //2.查询口味表并封装
       List<DishFlavor> dishFlavors = dishFlavorMapper.selectByDishId(id);
      //3.将查询到的数据封装到VO
        DishVO dishVO = new DishVO();
BeanUtils.copyProperties(dish,dishVO);
dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 修改菜品信息和口味信息
     * @param dishDTO
     */
    @Override
    @Transactional
    public void updateById(DishDTO dishDTO) {
//1.更新菜品
        Dish dish = new Dish();
BeanUtils.copyProperties(dishDTO,dish);
dishMapper.updetedishById(dish);
//2.更新口味，统一删除原先口味，再重新插入口味
    //删除
        dishFlavorMapper.deleteById(dishDTO.getId());
    //插入
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if(flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味中插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 修改菜品状态
     * @param status
     */
    @Override
    public void updateStatus(Long id,Integer status) {
        Dish dish = new Dish();
dish.setStatus(status);
dish.setId(id);

        dishMapper.updetedishById(dish);
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> getByCategoryId(Long categoryId) {

      List<Dish> dish= dishMapper.getByCategoryId(categoryId);

        return dish;
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.selectByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

}
